The first time I waxed the unit I noticed a wavey line in the fiberglass finish at the top 4" about 8' long on the drivers side top rear of the 5th wheel. It had to be viewed from a ladder at just the right angle to notice. The finish appears to be sagging from the application of the fiberglass topcoat material.(like it was sprayed on to heavy). I accepted it as a minor flaw and as since it wasn't to noticeable I didn't report it to my dealer. Now I have had the unit 1 year and 7 months and the issue has changed. Little pieces of topcoat material are popping off (spalling) at the low (heaviest) edge of the sagged material leaving exposed substrate. Some are 1/4" in size. See attached pictures. Have you encountered this before?